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标题：Land-use intensification differentially affects bacterial, fungal and protist communities and decreases microbiome network complexity
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作者：Sana Romdhane ; Aymé Spor ; Samiran Banerjee 等
期刊名称：Environmental Microbiome
印刷版ISSN：2524-6372
出版年度：2022
卷号：17
页码：1-15
DOI：10.1186/s40793-021-00396-9
语种：English
摘要：Soil microbial communities are major drivers of cycling of soil nutrients that sustain plant growth and productivity. Yet, a holistic understanding of the impact of land-use intensifcation on the soil microbiome is still poorly understood. Here, we used a feld experiment to investigate the long-term consequences of changes in landuse intensity based on cropping frequency (continuous cropping, alternating cropping with a temporary grassland, perennial grassland) on bacterial, protist and fungal communities as well as on their co-occurrence networks. Results: We showed that land use has a major impact on the structure and composition of bacterial, protist and fun‑ gal communities. Grassland and arable cropping difered markedly with many taxa diferentiating between both land use types. The smallest diferences in the microbiome were observed between temporary grassland and continu‑ ous cropping, which suggests lasting efects of the cropping system preceding the temporary grasslands. Land-use intensity also afected the bacterial co-occurrence networks with increased complexity in the perennial grassland comparing to the other land-use systems. Similarly, co-occurrence networks within microbial groups showed a higher connectivity in the perennial grasslands. Protists, particularly Rhizaria, dominated in soil microbial associations, as they showed a higher number of connections than bacteria and fungi in all land uses. Conclusions: Our fndings provide evidence of legacy efects of prior land use on the composition of the soil microbiome. Whatever the land use, network analyses highlighted the importance of protists as a key element of the soil microbiome that should be considered in future work. Altogether, this work provides a holistic perspective of the diferential responses of various microbial groups and of their associations to agricultural intensifcation.
关键词：Land-use intensifcation;Microbial communities;Networks